If you've noticed water pooling infront of your dishwasher, it could be the #1 most common issue in kitchens. The dishwasher has a damaged or deteriorated door seal, also known as a tub gasket, they wear out over time, and will need to be replaced every so often. Water usually leaks from the lower sides of the door if there is a breach in the seal. Over time, it will cause your flooring to deteriorate, and mold to grow underneath your cabinets.